<template>
  <div class="app-container">添加讲师
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
    <el-form-item label="讲师头像">

        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>

        <!--
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
          @crop-upload-success：上传成功后的回调 -->
        <image-cropper
                      v-show="imagecropperShow"
                      :width="300"
                      :height="300"
                      :key="imagecropperKey"
                      :url="BASE_API+'/eduoss/fileoss'"
                      field="file"
                      @close="close"
                      @crop-upload-success="cropSuccess"/>

    </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>


<script>
import teacherAPI from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
  components: { ImageCropper, PanThumb },
  data(){
    return{
      teacher:{
        avatar:""//默认头像
      },
      imagecropperShow:false,//上传组件是否展示
      imagecropperKey:0,//上传组件得key值
      BASE_API:process.env.VUE_APP_BASE_API,//获取dev.env.js里面得值
      saveBtnDisabled:false//保存按钮是否禁用
    }
  },
  created(){
    this.init()
  },
   watch: {//监听
    $route(to, from) {
      this.init()
    }
  },
  methods:{
    //关闭上传弹框方法
    close(){
        this.imagecropperShow = false
        this.imagecropperKey = this.imagecropperKey + 1
    },
    //上传成功后得方法  
    cropSuccess(data){
        this.imagecropperShow = false
        //上传之后接口返回图片地址
        this.teacher.avatar = data.url
        this.imagecropperKey = this.imagecropperKey + 1
    },
    //初始化
    init(){
      if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.getInfo(id)
      }else{
        this.teacher = {
          avatar: process.env.VUE_APP_OSS_PATH + '/%E9%BB%98%E8%AE%A4%E5%A4%B4%E5%83%8F/%E9%BB%98%E8%AE%A4%E5%A4%B4%E5%83%8F.jpg'
        }
      }
    },
    //保存操作
    saveOrUpdate(){
      if(!this.teacher.id){
        //添加
        this.saveTeacher()
      }else{
        //修改
        this.upTeacher()
      }
      
    },
    //获取讲师id
    getInfo(id){
      teacherAPI.getTeacherInfo(id)
      .then(response => {
        this.teacher = response.data.teacher
      })

    },
    //添加讲师方法
    saveTeacher(){
      teacherAPI.addTeacher(this.teacher)
      .then(Response => {

        //提示信息
        this.$message({
            type: 'success',
            message: '添加成功'
        });

        //回到列表中
        this.$router.push({path:'/teacher/table'})        
      })
    },
    //修改讲师列表
    upTeacher( ){
      teacherAPI.updateTeacher(this.teacher)
      .then(Response =>{
        console.log(Response)
          //提示信息
          this.$message({
              type: 'success',
              message: '修改成功'
          });
          //回到列表中
          this.$router.push({path:'/teacher/table'})     
      })
    }

  }
}

</script>


